run_checkpoint

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The annotations already declare readOnlyHint=false, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds that the saved content is 'current research progress and next steps,' giving some semantic context, but it does not disclose overwrite behavior, permission requirements, or what happens on repeated checkpoints.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence with no filler. It is appropriately sized for a simple tool, though it could carry slightly more useful detail without becoming bloated.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 3 parameters, no output schema, and annotations that already cover safety, the description still omits required parameter semantics and any usage context relative to siblings. It leaves the agent under-informed about how to invoke the tool correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0% – none of projectId, runId, or note have any schema descriptions. The description only vaguely implies saving a note about progress; it never mentions the required projectId or runId parameters, so an agent cannot infer required inputs from the description alone.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb + resource ('Save current research progress and next steps'), so an agent can tell it is a checkpoint-writing tool. However, it does not differentiate from siblings like run_start or research_log, which also persist research state, leaving ambiguity about its distinct role.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no explicit when-to-use guidance, no exclusions, and no mention of alternatives such as run_start or research_log. The description only says what it does, not when an agent should invoke it.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.